Thomas handy



@uitrit tetes @anni @Hirn IMPROVED DEVICE `POB. GRINDING METAL PLATES.`

THOMAS HADY, OF l.D ECATUR, ILLINOIS.

Letters .Patent No. 60,181, dated .December 4, 1866 antedated November 23, 1866.

SPECIFICATION.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, THOMAS HANDY, of Decatur, in the county of Macon, and State of Illinois, have invented a new andimproved Device for Grinding Metal Plates, with a view of forming close joints; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had tothe accompanying drawings, forming part of this specification, in which Figure 1 is a plan or top view of my invention.

Figure 2, a side sectional View of the same, taken in the line a: x, iig. 1.

Figure 3, a front view of the same. 'i

Similar letters of referenceiindicate corresponding'parts.

This invention relates to a new and improved machine for grinding the edges of metal plates so that the same may be placedclosely in contact and perfect joints formed. The invention is more especially designed for grinding the edges of the mould-boardsand the shares of ploughs, but it may be advantageously used for other pnrposes.

' represents a framing which may be constructed in any proper mannerv to support the working parts, and B is a grindstonc, the shaft C of which has its bearings, a a, on the framing A. D D represent two parallel guides which are secured on the framing A, one at each side. These guides may be of cylindrical `form, and they have a frame or carriage, E, fittedv upon them at right angles so as to move freely back and forth thereon, and in a direction towards and from the face of the grindstone. The carriage may be thus operated by means of a screw, F, or other suitable means. Upon the carriage, E, there is placed a carriage, G, arranged in such a manner that it may slide freely on and in a direction parallel with the shaft of the grindstone.- This carriage,` G, may be operated by hand or otherwise, and the metal plates to be operated upon are secured tothis carriage by means of a clamp, H, composed of a bar bent or shaped so as to admit of its ends, b b, being firmly secured to the carriage and the portion, c, between, elevated to admit of the plate to be operatedfupon being passed underneath, said plate being held by screws, d d, which pass through the elevated portion, c. The `carriage, E,

at its side nearest the grindstone, B, and atene side of vthe latter, has two vertical bars, e e, secured to it, and` each of these bars has a bar, f, pivoted to it. These bars serve as a gauge to adjust the plate to be operated upon in proper position on the carriage G.` In the drawings the mould-board, I, of a plough is shownl adjusted on the carriage, E, and from the above description it will b e seen that the lower edge. g, of the mould-board when properly adjusted to carriage G, and the carriage E moved a requisite distance towards the grindstone, so that the lower edge, g, of i the mould-board will have a proper relative position with the face of the grindstone, said edge may, by moving the carriage G, be drawn over the face of the stone and ground perfectly straight or true, and the upper edge of the share may, of course be ground in the same manner, and a close, tight joint obtained when the ground edges of the mould-board and share are placed in contact. By this arrangement it will also be seen that the. face of the grindstone will be kept perfectly true, as the articles to be ground are fixed and cannot yield or give to allow the stone to become uneven. The Work may also be quickly done as well as perfectly done.

Having thus described my invention, I claim as new, and desire to secure byLetters Patent- 1. The combination of the carriage E, carriage G, ways D, screws F, clamp H, and b'arse f, arranged and i operating in the manner and for the purpose herein specied.

2. I further claim the gauges, composed of the bars ef, applied to the carriage G, substantially as and for the purpose set forth. HOL AS H Y T I AND Witnesses:

' L'E'vr NALE,

J. G. STARR. 

